You are answering a USMLE-style medical question. Question: A 71-year-old man complains of urinary hesitancy and nocturia of increasing frequency over the past several months. Digital rectal exam was positive for a slightly enlarged prostate but did not detect any additional abnormalities of the prostate or rectum. The patient’s serum PSA was measured to be 6 ng/mL. Image A shows a transabdominal ultrasound of the patient. Which of the following medications should be included to optimally treat the patient's condition? Options: A) Clonidine B) Finasteride C) Dihydrotestosterone D) Furosemide Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.